Improvement in the production of water-proof gum



DANIEL M. LAMB, OF STRATHROY, CANADA.

IMPROVEMENT in THE mentioned or WATER-PROOF GUM.

Specification fOl'mln g part of Letters Patent No. li fl flflml, dated June 24,1873; application filed May 3,1873.

To all who: it may concern Be it known that I, DANIEL MARTIN LAMB, of Strat-hroy, in the county of Middlesex and Province of Ontario, Canada, machinist, have invented, discovered, or produced a new and useful later-Proof Gum, of which the following is'a specification:

My invention consists in the production of a new water-proof gum, suitable for many purposes in the arts, capable of being vulcanized, and ,when so vulcanized, possessing many of the characteristics of vulcanized rubber or gutta pereha, which gum I produce by extracting the caontehouc contained in plants of the 'asclepias or milk-weed family, and other an alogous plants possessing like properties, and

inspissating it by evaporation, thus producing a gum hard enough for manipulation.

In the specification of another application filed simultaneously herewith, I have set forth the best and cheapest way now known to me of extracting the gum, which way consists in fermenting the plant when in a green state, straining out the juice either with or without pressure, and inspissatiug the gummy liquid ,thus separated from therwoody fiber. This separation obviously, however, might be effected 1n other more expensive wa yssnch, for instance, as pressing the juice from the plants without fermentation, and then treating that properties.

' DANIEL M. LAMB. Witnesses:

M. KNOWLTON, Osrnvws KNIGHT. 

